不请自来

不請自來
bùqǐngzìlái
  1. to turn up without being invited
  2. unsolicited

CEDICT

to turn up without being invited

Wiktionary

没有被邀请而自行到来。

重編國語辭典

没有被邀请而自行到来

維基詞典

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
2 请 qǐng
  1. to ask
  2. to invite
  3. please (do sth)
  4. to treat (to a meal etc)
  5. to request
3 自来 zìlái
  1. from the beginning
  2. always
  3. to come of one's own accord